1步杀：后到a8 (f3)
li-04Mpq命名标签 (格·N)战术主题
悬子：对方有棋子无人保护——吃掉它。
一步将杀：找到让对方王无路可逃的一着棋。
难度687 ShuffleRating——适合初学者迈出Chess960战术的第一步。
白方走棋——找出最佳续着
How to recognize this tactic
A hanging piece is one that is attacked and not defended, or defended too few times. Count attackers against defenders on each enemy unit; where attackers win, take it — often with an in-between move or a check to gain the extra tempo.
A mate in one hides among forcing checks. Run through every check you can give: does it cover all the king's escape squares, is the checking piece safe or supported, and can nothing block or capture it? If yes, that is the mate.
General method: before you move, list the forcing candidates — every check, every capture, every direct threat — and calculate those first. The solution to a tactic is almost always among them.
棋盘上的局面
白方：王 h1, 后 f3, 车 b1, 象 b5, 兵 a2 c2 g2 h2 c3。
黑方：王 d8, 后 e7, 车 a8 h8, 兵 e5 b6 d6 a7 c7 f7 h7。
棋盘上有9枚白棋和11枚黑棋；该题局面出现在第19回合之后。
The position in numbers
Black are ahead by 4 points of material (22 against 26; pawn = 1, knight and bishop = 3, rook = 5, queen = 9) — the tactic has to convert or outweigh that.
The white king stands on h1, the black king on d8.
It is White to move on move 19, with 45 legal replies to weigh — only the line that keeps the advantage solves the puzzle.
White keeps 5 pawns, Black 7. No file is fully open, so the heavy pieces have to be pried in. Half-open for White: b, d, e, f.
The White king has 1 empty squares to step to right now — the fewer they are, the closer a mating net.
解答与讲解
主要变着
19. Qxa8#
为何奏效
- 好棋！后到a8保持压力（#）。
- 该变着以1步强制将杀结束。
Move by move
- 19. Qxa8# — 后 to a8 (capture) and it is checkmate
本题的题型
一步杀
一步将杀——把它找出来。
一步杀：组合已经落幕，只剩最后一发精准的子弹。方法很简单——列出你所有的将军，对每一个检验国王的三条生路：逃跑、垫挡、吃掉将军者。三条都行不通，那就是将杀。典型错误是爱上找到的第一个将军，漏掉那扇唯一的逃生小窗。
悬子
有个子没人保护——直接吃掉它。
悬子就是没有任何保护、可以白吃的棋子。听起来太初级，可业余棋局的多数胜负正是这样决定的。养成习惯：每步棋之前扫一遍全盘，标出所有无保护的棋子——自己的和对方的。典型的错误是在只需弯腰捡礼物的地方，苦苦寻找华丽的组合。
来源
源自 Lichess 题库（CC0）。
经 Stockfish 深度 20+ 验证。
解法强制性已确认（verified）。
题包 001
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